High-speed compression and vacuum pump.



M. WENKEL.

HIGH SPEED COMPRESSION AND VACUUM PUMP.

APPLICATION FILED MAY 26, 1909.

947 536 Patented Jan. 25, 1910.

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MM WENKEL, OF SGHLOTTWITZ, GERMANY, ASSIGNOR TO CONRAD GERICKE, OFPOTSDAM, NEAR BERLIN, GERMANY.

HIGH-SPEED COMPRESSION AND VACUUM PUMP.

Qd'LEDSG.

Specification of Letters Patent.

Patented Jan. 25, 1910.

To all whom it may concern:

Be ,it known that I, Max VENKEL, a subject of the German Emperor,residing at Schlottwitz, district of Dresden, German Empire, haveinvented certain new and useful Improvements in High-Speed Compressionand Vacuum Pumps, of which the following is a specification.

This invention relates to machines, which are suitable for use ascompressors for the production of compressed air and other compressiblemedia for high pressure and as vacuum pumps, particularly the so-calledKryszat compressors and vacuum pumps. These machines are high speedmachines making 600 revolutions and more per minute. Nevertheless thisnumber of revolutions is not sufficient for enabling the machines to becoupled directly with high speed electric motors without any gearingsuch as spur wheels or the like; an endeavor to effect which is generalin cases where electric motors are employed for driving. In order toenable pumps of the kind mentioned, as well as compressors generally toeffect 1,000 revolutions and more per minute, it is necessary that thevalves should be suitably construoted and arranged and caused to act incooperation, thus that they should be as li ht and have as small astroke as possible, Without their stability being thereby impaired. Thepresent invention is an attempt to solve this problem.

Accordingly the invention consists in the particular I arrangement ashereafter described of two plates made of metal or other material actingin conjunction in a special manner as suctlon and pressure valves, whichare flexible and are combined with one another in a special mannerwithout the employment of special adjusting springs.

In Figures 1 and 2 and 3 to 5 two forms of the invention areillustrated. a

a is the cylinder, 1) the pressure or suction piston, c the suction andd the pressure valves, e the valve sup ort serving as the cylindercover, f the va ve openings of the suction or pressure valves, h, i, theair passa es in the cylinder cover, m, 'n, 0, p the air in ct and airoutlets in the machine. The arrows indicate the directions which thesuction and compressed air take.

In the form of the invention as seen in Figs. 1 and 2 the two valveplates 0 d are joined together by means of a r1vet or the like, and thepressure valve (l which serves as a seat for the suction valve 0 isscrewed to the cylinder cover, which is suitably formed for the purpose.The outer edge of the opening in the cylinder and in conjunction withthe suction-valve c closes the cylinder through the medium of thecylinder cover. The pressure valve d has through passages for thesuction air and for any other kind of gas. The valve plates 0 (l in thepresent case are round and are formed with excisions and perforations asseen in Fig. 1 in order that they may be as light and as flexible aspossible. The action of the valve system is as follows :-When the piston5 moves forward the air is drawn in through the passage m in'the cover 0and in consequence of the plate 0 being flexible, said plate is raisedfrom (Z and the air passes through the openings 9 and between the twovalve plates into the cylinder. During this suction stroke the valveplate (I is ressed against the edge of the cylinder. 8n the returnstroke of the piston the valve plate 0 is pressed against the throughopenings 9, completely closing them. and, as the margin of the valveplate (1 is raised from the edge of the cylinder. the air passes outthrough the passage 0 arranged in the cylinder. The advantages of thisform of construction over existing forms do not consist merely in theextremely simple and reliable action of the valves and in the insuringof an exceedingly small objectionable space but also in the arrangementwhereby in consequence of the simplicity of construction and the easyflexible mobility of the valve plates and their smallness, a wearing outof the valves is well nigh impossible and in connection therewith a highspeed can be attained. A further advantage exists in the convenientmanner in which the valves are built in, they being simply screwed on tothe cylinder cover that serves as valve bearer and therefore when thevalve bearer is removed can be easily removed and exchanged.

In the form of the invention as in Figs.

\ 3 to 5 a modification of that just previously described is shown, inwhich the cylinder cover e serves as a seat for both valves (1, c thelatter being once more united in the middle and acting together, similarto the arrangement according to Figs. 1 and 2.

The air is drawn in through openings h in the cylinder cover, passesthrough openings f in the valve-plate e and openings 71 in the cover,lifts the edge of the plated and passes out through the passage p in the,cylinder cover.

lnorder that there may be no objectionable space in the first form ofthe invention and that in the second form this space may be limited tothat which is formed by the openings 11 in the cylinder cover, thepiston b is suitably recessed on the end that lies against the cylindercover and the valve plate, or is furnished with a suitably profiledpiece. The present invention may also be suitably applied in connectionwith large compressors, in large numbers to the cylinder between thelatter and its cover or to special junctions arranged on the cylinder.

What I claim is: I

1. The combination with a pump having an inlet and an outlet port, onesurrounding the other, a stationary wall being interposed between theports, of oppositely operating coacting flap valves respectivelycontrolling theports, one of the valves extending across both ports andhaving openings therethrough to permit the passage of the fluid throughthe portnot controlled by it, and a fastening device passing centrallythrough botlf valves and securing the same together. I

The combination with a pump includ ing a cylinder, a piston operatingtherein and a head fixed to the cylinder and having concentricallyarranged inlet and outlet ports, one surrounding the other, a stationary wall being interposed between the ports, of oppositely operatingcoacting flap valves having free marginal portions respectivelycontrolling the ports, one of the valves extending across both ports andhaving an opening therethrough that permits the passage of fluid throughthe port not controlled by said valve, the other valve controlling suchpassage of fluid, and a fastening device passing centrally through thevalves and disposed axially to the ports.

3.- The combination with a pump having an inlet and a discharge, onesurrounding the other, of two flap valves having their central portionssecured together againstrelative movement and having their mar;

ginal portions respectively controlling the inlet and discharge.

4. lhe combination with a pump having an inlet and a discharge, onesurrounding the other, of two flexible oppositely acting flap valvessecured against relative movement at their central points andrespectively controlling the inletand discharge, one of said valveshaving 1 an opening through which the fluid passes in one direction andthe other valve preventing its passage through the opening in anopposite direction.

5. The combination with a pump including a head having a central portand another port surrounding the central port, of a;

flexible flap valve having a free marginal portion that controls theouter port and.

